Chair frame



FIG. 1 is a front perspective view of a chair frame showing my design;

FIG. 2 is a side elevational view, the undisclosed side being a mirrorimage thereof;

FIG. 3 is a top plan view;

FIG. 4 is a front elevational view; and

FIG. 5 is a rear elevational view thereof.

The support surface disclosed by means of broken lines in the figures isshown for illustrative purposes only.

The ornamental design for a chair frame, substantially as shown anddescribed.